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习题练习:Impulse and momentum



 作者: admin发布日期: 2024-08-07 16:03   总分: 17分  得分: _____________

答题人: 匿名未登录  开始时间: 24年08月07日 15:54  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  94.16: A car of mass m, traveling at speed v, stops in time t when maxicm 1ak8)s1h zxmum braking force is apph11cszx8ak)m lied. Assuming the braking force is independent of mass, what time would be required to stop a car of mass 2m traveling at speed v?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.04: When the velocity of a moving object is doubled, its_______is also doubl/h7hb vj3 :hz6wbn3hse3v6 js bhbh7h :3zh/wnd.

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.06: Impulse, Fnet 8qw.j b+ssrrp,mrv8, c a+ tim(3vea3$\Delta$tis best related to:

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.05: Which one of the following choices is mosx8s*cht+;w fnt closely associated with the following observation about an isolated object: “The fhx8 tw;c+n*slinear momentum of the object is constant.”?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.21: The change in linear momentum of an object is always in th w, zfj. h66m/v.b1jv.c tovsze same direction as v,cvf oj 1wz/hm.z vb66st..jthe

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.08: How long must a 100 N net force act to produce 6hxj(qmru 8/ 6sb(za i4sled ;a change in momentum of 200 mlqhei a /;jrs(6d 8xb4u z6(skg.m/s?

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.29: P and Q have the same momentum. Q can have more kinet)vsv ilk:vt -4ic energy than P if i 4-svlktivv:) t:

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  98.26: A ball with a mass of 0.50 kg and a spe;soazd: / +/x2i nu20a) 4dort:)yresutz tjxed of 6.0 m/s collides perpendicularly with a wall and bounces off e/x t sdud;+2o2:jzaxri4n t )a0/oyzut ):rswith a speed of 4.0 m/s in the opposite direction. What is the magnitude of the impulse acting on the ball?

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.08: A 50 kilogram gymnast falls fjwh 4mu : up)as:)c yoomp+08nreely from a height of 4 meters on to a trampoline. The trampoline then bounces her back upward with a speed equal to the speed at which she first struck the trampoline. What is the average force the trampoline applies on than )muwjypus0:oh): +o84 pcme gymnast?

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.27: A 2.0 kg masse 9gfb6+x snc.0tb0k 6)klvb4hpvr, j moves at 10.0 m/s when it has a collision in space. The mass’s speed was unchanged, but the direction of its velocity was alter4,h).0gjf tv96rv 0xb+ kcs nebb6 kpled by $80^{\circ}$. If the collision lasted 0.25 s, what was the magnitude of the average force exerted on the mass?



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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.13: A bat striking a 0.125 kg-baseball is in contact with t-8 ,5dj 028wysphldbgtew. hl he ball for a time of 0.03 seconds. The ball travels in a straight line as it approaches and then leaves the bat. If the ball arrives at the bat with a velocity of 4.5 m/s and leaves with a velocity of-6.5 m/s, what is the magnitude of the average force acting on thywe, d82 gb58plh.sw0 tdj- lhe ball?

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.43: An object of mass 4.0 g has atotal kinetic energy of 100.0 u5qc983h9p lu2,wlkqaxlu7n J and an x-component of linear momentum equal to 24.0 kg.m/s. The object is moving in 9q ul53lu82 p cx l,wka7quhn9the x-y plane. What is they-component of the object’s linear momentum?

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.05: At an instant of time t, a point object of mass M moves1 :r1( e2o+np u/qpxgevv tm0s with velocity V, has acceleration a, and is at position (x,y). In what direction must the lineaxpp tuev1gq1o2:nm/ +e (0sr vr momentum of the object be directed at this instant?

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.32: A rubber ball of mass 2.0 kg falling straight downward hits td9 0qkm .rpg j 3dkmubfu(hj1m*5 x11uhe ground with a speed of 0.90 m/s and then rebounds straight upward with a speed of 0.60 m/s. The collision time of them dmh.km15k9ug3 b(jxud 0q*1u fpr1j ball with the ground is 0.25 s. Treat g = 10 N/kg.
What is the magnitude of the average acceleration (in units of $m/s^{2}$ ) of the ball while it is in contact with the ground?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.33: A rubber ball of mass 2.0 kg falling straight downward hb lhcyeeh6 f 7)+0.kkkits the ground with a speed of 0.90 m/s and then rebounds straight upward with.+)hlhef0yk6 k7kbce a speed of 0.60 m/s. The collision time of the ball with the ground is 0.25 s. Treat g = 10 N/kg.
What is the magnitude of the average force (in units of Newtons) exerted by the ground on the ball while they are in contact?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  14.12: A box of mass 5.0 kg is being pushed to the right acrossdy9qeuknw x1; dig *r9q7i6:e a horizontal surface while a constant frictional force of 8.0 N acts on the box. At some instant of time, the box has a speed of 49*n g1yekx9ie dqwrqd6 iu:7;.0 m/s and an acceleration of$3.0\; m/s^{2}$ . What is the magnitude of the net force acting on the box at this instant?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.12: A box of mass 12.0 kg is being pushed to the rig*, wc9f;vqt8( xlosu(szn;1i hl6p mp ht across a horizontal surface. When the box has 12.0 J of kinetic energy, a 12.0 N net force acts on it. Which one of the following choices best represents the magnitude of the linea,;psosp8*c(h6 9qt;1nuvwl (lfmxzi r momentum of the box at this instant?

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